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authorJeff Layton <jlayton@kernel.org>2021-06-01 08:13:38 -0400
committerIlya Dryomov <idryomov@gmail.com>2021-06-29 00:15:51 +0200
commita6862e6708c15995bc10614b2ef34ca35b4b9078 (patch)
treebf2f23ba8a082c316da0447d72a75ee8a0a628a4 /fs/ceph
parentf3fd3ea6a26aed5449028608b639f6c6b2fda7f7 (diff)
ceph: add some lockdep assertions around snaprealm handling
Turn some comments into lockdep asserts. Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/snap.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index 2a63fb37778b..bc6c33d485e6 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -65,6 +65,8 @@
void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
struct ceph_snap_realm *realm)
{
+ lockdep_assert_held_write(&mdsc->snap_rwsem);
+
dout("get_realm %p %d -> %d\n", realm,
atomic_read(&realm->nref), atomic_read(&realm->nref)+1);
/*
@@ -113,6 +115,8 @@ static struct ceph_snap_realm *ceph_create_snap_realm(
{
struct ceph_snap_realm *realm;
+ lockdep_assert_held_write(&mdsc->snap_rwsem);
+
realm = kzalloc(sizeof(*realm), GFP_NOFS);
if (!realm)
return ERR_PTR(-ENOMEM);
@@ -143,6 +147,8 @@ static struct ceph_snap_realm *__lookup_snap_realm(struct ceph_mds_client *mdsc,
struct rb_node *n = mdsc->snap_realms.rb_node;
struct ceph_snap_realm *r;
+ lockdep_assert_held_write(&mdsc->snap_rwsem);
+
while (n) {
r = rb_entry(n, struct ceph_snap_realm, node);
if (ino < r->ino)
@@ -176,6 +182,8 @@ static void __put_snap_realm(struct ceph_mds_client *mdsc,
static void __destroy_snap_realm(struct ceph_mds_client *mdsc,
struct ceph_snap_realm *realm)
{
+ lockdep_assert_held_write(&mdsc->snap_rwsem);
+
dout("__destroy_snap_realm %p %llx\n", realm, realm->ino);
rb_erase(&realm->node, &mdsc->snap_realms);
@@ -198,6 +206,8 @@ static void __destroy_snap_realm(struct ceph_mds_client *mdsc,
static void __put_snap_realm(struct ceph_mds_client *mdsc,
struct ceph_snap_realm *realm)
{
+ lockdep_assert_held_write(&mdsc->snap_rwsem);
+
dout("__put_snap_realm %llx %p %d -> %d\n", realm->ino, realm,
atomic_read(&realm->nref), atomic_read(&realm->nref)-1);
if (atomic_dec_and_test(&realm->nref))
@@ -236,6 +246,8 @@ static void __cleanup_empty_realms(struct ceph_mds_client *mdsc)
{
struct ceph_snap_realm *realm;
+ lockdep_assert_held_write(&mdsc->snap_rwsem);
+
spin_lock(&mdsc->snap_empty_lock);
while (!list_empty(&mdsc->snap_empty)) {
realm = list_first_entry(&mdsc->snap_empty,
@@ -269,6 +281,8 @@ static int adjust_snap_realm_parent(struct ceph_mds_client *mdsc,
{
struct ceph_snap_realm *parent;
+ lockdep_assert_held_write(&mdsc->snap_rwsem);
+
if (realm->parent_ino == parentino)
return 0;
@@ -696,6 +710,8 @@ int ceph_update_snap_trace(struct ceph_mds_client *mdsc,
int err = -ENOMEM;
LIST_HEAD(dirty_realms);
+ lockdep_assert_held_write(&mdsc->snap_rwsem);
+
dout("update_snap_trace deletion=%d\n", deletion);
more:
ceph_decode_need(&p, e, sizeof(*ri), bad);